Adding-machine spool



March 16', 1926. 1,577,326

' E. G. 'LEON ADDING MACHINE SPOOL Filed April 14 1925 v OR l'ru zwm I ATIT-WHEY Patented Mar. 16, 1826,

UNITED STATES ELMER G. LEON, OF HUBBLETON, WISCONSIN.

ADDING-MACHIN E SPOOL.

Application filed April 14, 1925. Serial No. 23,098.

To all whom it may concern;

Be it known that I, ELMER G. LEoN, a citizen of the United States, residing at Hubbleton, in the county of Jefferson and State of Wisconsin, have invented new and useful Improvements in Adding-Machine Spools, of which the following is a specification.

This invention relates to an attachment for adding and similar machines, the gen eral object of the invention being to provide means for indicating when the roll or strip of paper is about to run off the supply roller. g

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawings and pointed out in the appended claim.

In describing my invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which:

Figure 1 is a view showing a roll of paper wrapped on my improved spool.

Figure 2 is a perspective View of the spool.

Figure 3 is aview showing how the paper is marked by the ribs on the spool.

In these views, 1 indicates the spool upon which the strip or sheet 2 of paper is wound. This spool is provided with the triangular shaped ribs 3 which extend longitudinally of the spool. Otherwise, the spool may be made in the usual manner. The first por-, tion of the strip or sheet wound upon the spool will be marked by the sharp edges of the ribs, as shown at 4 in Figure 3, so that when the strip has almost been used up this marked portion will appear so that the op erator will know that the end of the strip has almost been reached and that a new spool must be placed in the machine. In Figure 3 it will be noted that by forming the triangular ribs at diametrically opposite points in pairs about the perimeter of the spool, it forms a nearly rectangular member and assures positive creasing of the paper or other matleial wound upon the spool so that during the unwinding of the spool the operator may readily ascertain when the end of the strip wound upon the spool is being approached. While this spool is mainly designed for adding machines, it will, of course, be understood that it may be used on other machines.

It is thought from the foregoing description that the advantages and novel features of my invention will be readily apparent.

I desire it to be understood that I may make changes in the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope of the appended claim.

Having thus described the invention, what is claimed as new, is

A spool of the class described having longi tudmally extending triangular shaped ribs on the outer surface thereof and disposed in diametrically opposed relation whereby to form a substantially rectangular member having sharpened corners for forming indicative parts in paper or other material wound upon the spool.

In testimony whereof I afliX my signature.

'ELMER G. LEON. 

